Device for receiving a suction hose and vacuuming device having a receiving device

ABSTRACT

A device for receiving a suction hose that connects a nozzle of a vacuuming device to a central unit of the vacuuming device. The device is has at least one holding device that can be arranged on the central unit of the vacuuming device, wherein the suction hose is able to be fitted in the at least one holding device such that the hose can be accommodated in a secure and stable manner. This advantageously makes it possible for the user of the vacuuming device to be able to adapt the length of the suction hose as required to the task currently to be performed. Here, the unused part of the suction hose is stored in a particularly secure and stable manner in the device or in cavities of the device that can be formed between the at least one holding device and a rear part. In a second aspect, the invention relates to a vacuuming device having a central unit that is connected to a suction hose having a nozzle.

The present invention relates to a device for receiving a suction hosethat connects a nozzle of a vacuuming device to a central unit of thevacuuming device.

BACKGROUND

The dust which arises on a construction site is often damaging to healthand should not be inhaled by people. A distinction is usually drawnbetween primary and secondary dust. Primary dust is formed duringvarious uses, such as drilling, chiseling or grinding of surfaces. Thisdust spreads out in the air and can easily be inhaled by people in thevicinity. The dust can also collect on the floor or on other surfacesand thereby becomes secondary dust. In respect of this secondary dust,there is the risk that it will be stirred up again during further worksteps and will thus be able to get into the airways of workers orpassersby.

In order to avoid the spreading of primary dust, use is usually made ofa dust collector, which is capable of collecting and/or extracting thedust directly at the point of formation thereof by means of suitablesystems or attachments. This prevents dust from getting into thesurrounding air and being inhaled by workers or passersby. To remove thesecondary dust, use is usually made of a dust collector or a vacuumcleaner in order to selectively suck up the dust from the ground anddispose of it.

The conditions on a construction site do not always make it possible towork with a “floor-based” cleaner, as it is known. For example, thereare a large number of objects, construction materials or power toolslying around on the ground, and these cannot be passed over by a cleanerequipped with casters. In addition, stairs are often present or work iscarried out on scaffolding. For this reason, it is advantageous both fortransportation and for use when the cleaner can be carried on the user'sback. This makes it possible to work in a mobile manner and improves thepossible applications of the cleaner. In a portable configuration, thecleaner is referred to, in the context of the invention, as a backpackcleaner, backpack vacuum cleaner or backpack vacuuming device.

SUMMARY OF THE INVENTION

Modern vacuuming devices can be used to some extent in a flexible mannerin different fields of application, for example both as a portablebackpack cleaner, which is transported on a user's back, and as afloor-based cleaner, which can move over the floor for example by way ofcasters or wheels. In particular when the cleaner is intended to beoperated both from the floor and from the user's back, different optimalhose lengths arise depending on the application. If the cleaner isintended to be operated for example from the floor, the optimal hoselength for this application can be for example 3 m or more, in order forit to be possible, for example, to also directly vacuum drilled holes inthe vicinity of the ceiling or at locations that are difficult toaccess. However, if the cleaner is located on the user's back, anoptimal hose length of much less than 2 m may be advantageous, sinceotherwise the excess hose length drags on the floor and/or may representa trip hazard.

It is an object of the present disclosure to provide a cost-effectiverobust system for accommodating the suction hose, which allows the userto be able to store the excess hose length in a flexible manner. Itwould be particularly desirable from the point of view of experts forthe user to still be able to vary the hose length even when the cleaneris already on the user's back.

Hoses that can retract automatically are known from the prior art.However, these hoses are not suitable for cleaners that are equippedwith automatic filter dedusting. Devices for carrying out automaticfilter dedusting frequently have a secondary-air valve. During filterdedusting, a pressure shock is usually generated, which, in conjunctionwith the secondary-air valve, could have the result that anabove-described suction hose may abruptly retract and extend again. Thismovement would potentially continue as far as the central unit of thecleaner, such that this abrupt movement may be transmitted to a usercurrently working with the cleaner. This can have a negative effect onthe operability of the cleaner, since jolting forces can arise at thecleaner, and these may have the effect for example that the user can nolonger guide the cleaner in a targeted manner. Furthermore, the cleaneris often attached to a power tool such as a power drill or a sander. Theretraction of the hose can also have a negative effect on theoperability of the power tool.

A further object underlying the present invention therefore consists inproviding an accommodation possibility for a suction hose of a vacuumingdevice, which is configured in a particularly simple and cost-effectivemanner. Furthermore, the device to be provided should be robust enough,in particular with respect to external influences such as moisture ordust, that it can be used without problems even in very dusty locationssuch as construction sites. In particular, the device should be able tobe used in conjunction with vacuum cleaners that can be used both asfloor-based cleaners and as backpack cleaners, wherein the solution tobe provided should in particular be capable of being used in conjunctionwith filter dedusting at the cleaner.

The present invention provides a device for receiving a suction hosethat connects a nozzle of a vacuuming device to a central unit of thevacuuming device. The device is characterized in that it has at leastone holding device that is able to be fastened to the central unit ofthe vacuuming device, wherein the suction hose is able to be fitted inthe at least one holding device such that the hose can be accommodatedin a secure and stable manner. In the context of the invention, it ispreferred that the suction hose is fitted in the at least one holdingdevice in loops such that a length of the suction hose can be defined bya number of the loops. For example, a greater hose length for workingwith the vacuuming device is available when the hose is wrapped aroundthe holding device with a small number of loops, while a shorter hoselength for working with the vacuuming device is available when the hoseis wrapped around the holding device with a large number of loops.

According to the invention, the vacuuming device has a central unit,which preferably has a motor, a turbine and a dust collecting tank. Byway of the turbine, a negative pressure can be generated, with whichdust can be sucked into the interior of the cleaner. In the interior ofthe cleaner, or in the interior of the central unit, there may bearranged a dust collecting tank, in which the sucked-in dust can becollected. A dust (collecting) bag that can be replaced when the bag isfull can be fitted in the dust collecting tank. The turbine forgenerating the negative pressure can be driven by a motor, which ispreferably an electric motor. The central unit can also have a controldevice, operating elements or communication means. The control device ispreferably set up to control the vacuuming device. The operatingelements can be used by a user to perform settings on the cleaner, toset a suction power or to switch the cleaner on or off. Anycommunication means can be used so that the cleaner can communicate withother devices such as a power tool, an accessory part or other mobiledevices, for example a smartphone. In particular, the central unit canbe connected via a suction hose to a nozzle for sucking in the dust. Thenozzle can preferably be a floor nozzle with which dust lying inparticular on the floor can be sucked up. However, the nozzle can alsobe configured in any other conceivable manner in order to pick up dust.The central unit of the vacuuming device can furthermore comprise afilter, which protects the turbine from dirt and dust. By picking upthese contaminants, the filter can become clogged, with a solid filtercake frequently forming on the filter. By way of a filter dedustingprocess, the filter can be dedusted preferably mechanically, such thatthe filter is subsequently available again with its full filteringcapacity. Advantageously, the proposed invention makes it possible touse, as the suction hose, a commercially available suction hose whichhas no special features that allow it in particular to retractautomatically. Such retracting hoses, as are known from the prior art,frequently cannot be used in conjunction with cleaners that areconfigured to carry out automatic filter dedusting. Since a commerciallyavailable suction hose can be used in conjunction with the invention,the proposed receiving device can advantageously also be used inconnection with a vacuuming device having filter dedusting.

In the context of the invention, it is in particular preferred that thedevice does not comprise any moving parts. As a result of the avoidanceof moving parts, the device is particularly robust with respect toexternal influences such as dust and/or moisture. In particular, avacuuming device having a proposed receiving device does not have anygaps that may arise for example as a result of the movement ofcomponents. Such gaps frequently serve as gateways for dust and/ormoisture. In this regard, the proposed vacuuming device having theproposed receiving device, which preferably manages without movingparts, is protected particularly effectively from these externalinfluences and is therefore particularly suitable for use inconstruction and in particular outdoors. The wording that “the devicedoes not comprise any moving parts” preferably means, in the context ofthe invention, that the device in particular does not comprise anycomponents that are displaceable, rotatable or movable in translation.

The wording does not preclude individual constituents of the device frombeing able to be formed for example in a resilient manner. Inparticular, it is preferred in the context of the present invention thatthe holding devices at least partially comprise resilient material inthat they can be configured for example as a clip. The suction hose canfor example be fitted and/or clipped in place in such a clip, such thatit can be fastened in a stable and secure manner. This in particularprevents the hose from being freely movable and disrupting, impeding oreven endangering the user when using the vacuuming device. In thecontext of the invention, it is for example preferred that the at leastone holding device comprises metal and/or plastic. For example, theholding devices can be manufactured from bent sheet-metal parts orplastics parts, which entail optimal resilience for use as a resilientholding device. In particular, the resilience can be set via a suitablechoice of thickness and/or material of the bent sheet-metal or plasticsparts.

In the context of the invention, it is preferred that the at least oneholding device has a wavy profile. This is in particular advantageous inorder to avoid squeezing of the suction hose. The wording “wavy profile”preferably means, in the context of the invention, that the holdingdevice can comprise for example a resilient piece of plastic or metalthat has peaks and troughs or elevations and recesses (cf. for exampleFIG. 1 ). The terms “recess” and “elevation” do not represent unclearterms for a person skilled in the art because a person skilled in theart defines the terms, in the context of the present invention, via arespective distance from a rear part of the receiving device. A recessin the holding device, or in the wavy profile, is characterized, in thecontext of the invention, in particular in that the recess exhibits agreater distance from a rear part of the carrying system than anelevation of the holding device, or of the wavy profile. This applies inparticular to a deepest point of the recess and a highest point of theelevation. The recesses can be configured for example to each receive aloop of the suction hose, wherein a distance between the recess of theholding device and a rear part of the device can correspond to adiameter of the suction hose. In this case, the term “correspond”preferably means, in the context of the invention, that the distancebetween the recess of the holding device and the rear part of the devicecan be matched to the suction hose used, or to the diameter thereof. Inparticular, the distance can be chosen such that the suction hose can bereceived in a secure and stable manner in the cavity formed between therecess of the holding device and the rear part of the device, andlightly clamped therein, such that it does not fall out of the cavityunder normal vibrations and loads. On the other hand, the distancebetween the recess of the holding device and the rear part of the devicealso should not be chosen to be too small, in order not to pinch thehose. In the context of the invention, it is preferred that a distancebetween a peak, i.e. an elevation, of the holding device and the rearpart of the device is smaller than the diameter of the hose, in order tohold the hose in the cavity formed by the recess and rear part.

In the context of the invention, it is preferred that a holding devicehas one to three recesses, wherein each recess, together with the rearpart of the receiving device, preferably forms a cavity for receiving aloop of the suction hose. In a very particularly preferred embodiment,the wavy profile of the holding device has two recesses, such that thereceiving device comprises two cavities for receiving two loops of thesuction hose. A number of two cavities for receiving two loops has beenfound, in practical tests, to be a good compromise for the hose lengthsnormally used in construction site cleaners. In the context of theinvention, the wavy profile forms the front side of the receivingdevice, while the rear part forms the rear side of the receiving device.However, in the context of the invention, it may also be preferred forthe front side to be formed by a profile or a two-dimensional device,such as a plate, which does not constitute a wavy profile. FIG. 3illustrates an embodiment of the invention that has a holding device,wherein the holding device has, on its front side, a metal plate forclamping the suction hose in place. Preferably, the metal plate isconfigured, for example by way of a sufficiently small thickness, suchthat it has resilient properties. As a result, the plate can be pushedaway from the rear part of the receiving device in order to fit thesuction hose in the cavity between the plate and rear part. As a resultof a movement back in the direction of the rear part, the suction hoseis clamped in place in the cavity and the suction hose can, as a result,be fixed or fastened to the vacuuming device in the receiving device.Preferably, the suction hose is clamped in place in the holding deviceonly lightly enough for it to be able to be displaced in a lateraldirection. As a result, the hose can be moved within the receivingdevice by pushing and/or pulling movements and the length thereof thatis available to the user of the cleaner for working with the cleaner canbe set. The plate that forms the front side of the holding or receivingdevice can for example also comprise plastic or be in the form of aplastics plate.

In the context of the invention, it is preferred that the device is ableto be integrated into a carrying system of the vacuuming device. Thecarrying system can serve for example for the vacuuming device to beable to be used as a backpack cleaner and to be carried on a user'sback. The carrying system can be configured in a similar manner to thecarrying system of a relatively large travel backpack or of a framebackpack. The carrying system can comprise various belts, straps andclasps that allow the central unit of the vacuuming device to befastened to a user. Preferably, the carrying system comprises a sidefacing the user's back and a side facing away from the user's back, onwhich the proposed device can be arranged. In the context of theinvention, it is preferred that the side of the carrying system thatfaces away from the user's back forms the rear part of the device, saidrear part, together with the at least one holding device, forming acavity for receiving the suction hose. However, in the context of theinvention, it may also be preferred for the device to be arranged at adifferent position on the vacuuming device. Preferably, the proposedvacuuming device can be used both as a backpack cleaner and as afloor-based cleaner. In this regard, besides the carrying system, thevacuuming device preferably also comprises means that allow the cleanerto be moved around on a floor or a substrate.

In the context of the invention, it is preferred that the devicecomprises one to five holding devices, preferably one to three holdingdevices and most preferably two holding devices. A number of two holdingdevices, as illustrated for example in FIG. 1 , has proven to beparticularly stable under vibrations. The preferably two holding devicescan be configured in a substantially symmetric manner to one another andbe arranged next to one another. In particular, the wavy profiles of thepreferably two holding devices can be configured in a symmetric mannerto one another, such that recesses or elevations are provided at in eachcase the same height of the device. The recesses preferably formcavities, which are bounded by the rear part of the device. In thecontext of the invention, it is preferred that the cavities are likewisearranged at the same height of the device, such that, when two holdingdevices are provided, the suction hose can be clamped in place forexample in the two cavities of the device that are arranged next to oneanother. As a result of the provision of the preferably two holdingdevices, the hose can be fixed at two contact points, such that it isoptimally secured not only with respect to slipping to the side but alsowith respect to a vertical upward or downward movement. The terms “top”and “bottom” or “up” and “down” are not unclear terms for a personskilled in the art in the context of the present invention, because aperson skilled in the art knows that the term “bottom” or the spatialdirection “downward” refers to the side of the device or of the vacuumcleaner that faces the ground. The term “top” or the spatial direction“upward” means, in the context of the invention, preferably the side ofthe device or of the vacuum cleaner that faces away from the ground or asubstrate.

In a second aspect, the invention relates to a vacuuming device having acentral unit that is connected to a suction hose having a nozzle. Thevacuuming device is characterized in that the vacuuming device has aproposed receiving device, i.e. the receiving device has at least oneholding device that can be arranged on the central unit of the vacuumingdevice, wherein the suction hose is able to be fitted in the at leastone holding device. In the context of the invention, it is in particularpreferred that the suction hose is configured in a pressure-stablemanner. As a result, it is possible for the hose to be able to beintroduced into or pulled out of the device by way of a pushing orpulling movement. As a result, the hose can be tidied away or its lengthincreased as required—advantageously in particular with only one hand.This advantageously means that the user can use their second hand forother activities. The terms, definitions and technical advantagesintroduced for the receiving device apply preferably in an analogousmanner to the proposed vacuuming device.

According to one exemplary embodiment of the invention, the device isaccommodated in a carrying system for a vacuuming device. The deviceserves in particular for holding and/or receiving the suction hose, andso, in the context of the invention, the proposed device can be referredto preferably as a receiving device. In particular, with the proposedreceiving device, a variable length of the suction hose can beaccommodated. This is achieved preferably in that the suction hose canbe wound with different numbers of loops that are received by thereceiving device. Depending on the number of hose loops that arereceived by the receiving device, a length of the hose with which theuser of the vacuuming device can work can be set.

The receiving device can preferably have a wavy profile in order thatthe hose is not squeezed in spite of being held. One or more loops ofthe hose can be placed selectively into this wave profile. The useradvantageously has the possibility of pulling on the hose when thesystem is located on their back. As a result of the pull, a largeramount of the hose can be released when a longer hose section isrequired for working with the cleaner. In the context of the invention,it is in particular preferred that the hose is configured in apressure-stable manner. As a result, the hose can be pushed back intothe receiving device again by way of a pushing movement by the user.

The proposed solution is distinguished by a particularly simple, robustconstruction, since, in particular, it does not comprise any movingparts, which often tend, under construction site conditions and thepossibly dusty environment, to jam or to become worn. In particular, acost-effective possibility for accommodating excess hose material can beprovided with the invention. In addition, with the proposed invention,working safety is increased since the invention for example particularlyeffectively prevents a user from tripping over a hose lying around onthe floor. At the same time, in spite of the stable storage or holdingof the hose, a length of the suction hose can be set such that the samecleaner with the same hose is suitable both for floor applications andbackpack applications. In other words, the proposed vacuuming device, orthe central unit thereof, can be used both as a backpack cleaner and asa floor-based cleaner. In addition, the proposed receiving device canalso be used to stow the hose substantially fully for purelytransportation activities.

The receiving device can optionally comprise one or more clips asholding devices, wherein the holding devices make it possible toaccommodate, i.e. receive, one or more loops of the suction hose. Thenumber of loops that can be received by a holding device dependspreferably on the number of cavities that are formed between therecesses of the wavy profile of the holding device and the rear part ofthe receiving device. The clip devices can comprise both bentsheet-metal parts and plastics parts for holding. These can form inparticular the preferably resiliently configured wavy profile of the atleast one holding device.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages will become apparent from the following descriptionof the figures. The figures, the description and the claims containnumerous features in combination. A person skilled in the art willexpediently also consider the features individually and combine them toform useful further combinations.

In the figures, identical and similar components are denoted by the samereference signs. In the figures:

FIG. 1 shows a view of a preferred configuration of the receiving device

FIG. 2 shows a further view of a preferred configuration of thereceiving device with a suction hose

FIG. 3 shows a view of a preferred configuration of the vacuuming devicewith the receiving device

DETAILED DESCRIPTION

FIG. 1 shows a preferred configuration of a receiving device (1) of thepresent invention. In particular, FIG. 1 shows a receiving device (1)that is arranged on a carrying system (11) of a vacuuming device (4,illustrated in FIG. 3 ) configured inter alia as a backpack cleaner. Thevacuuming device (4) can comprise a suction hose (2, illustrated inFIGS. 2 and 3 ) and a nozzle (not illustrated in FIG. 1 but indicated asnozzle 12 in FIG. 3 ), wherein the dust sucked in by the nozzle can betransported through the suction hose (2) into a dust collecting tankwithin a central unit (3, illustrated in FIG. 3 ) of the cleaner (4).The receiving device (1) has at least one holding device (5), whereinthe receiving device (1) illustrated in FIG. 1 has for example twosubstantially symmetric holding devices (5) that are arranged parallelto one another. The holding devices (5) illustrated in FIG. 1 comprise awavy profile (6), which, in the context of the invention, is preferablyalso referred to as a wave profile (6). The holding device (5) and thewavy profile (6) have recesses (7) and elevations (8), which arerespectively characterized by different distances from a rear part (9)of the carrying system (11) of the vacuuming device (4).

Preferably, the carrying system (11) of the cleaner (4) has a rear part(9), which at the same time also forms the rear part (9) of thereceiving device (1). Formed between the rear part (9) and the wavyprofile (6) are cavities (10), which are suitable in particular forreceiving the suction hose (2) of the vacuuming device (4). Inparticular, the cavities (10) are formed between the recesses (7) of thewavy profile (6) and of the holding device (5). In the context of theinvention, it is preferred that the recesses (7) exhibit a greaterdistance from the rear part (9) than the elevations (8) of the wavyprofile (6) and of the holding device (5). The distance between a recess(7) and the rear part (9) is in particular large enough that the suctionhose (2) can be fitted or clamped in place in a cavity (10) thus formed.In the context of the invention, it is preferred that the suction hosecan be shifted to the right or left with a horizontal movement withinthe holding device(s) (5) of the receiving device (1). As a result, thehose length available to the user of the cleaner (4) can be set. Inparticular, the invention makes it possible for the hose length withwhich the user of the vacuuming device (4) can work to be able to be setby a pulling and/or pushing movement on the part of the user.

FIG. 2 shows a further view of a preferred configuration of thereceiving device (1). FIG. 2 illustrates in particular the suction hose(2), which can connect the nozzle of a vacuuming device (4) to thecentral unit (3) thereof. The suction hose (2) can be wound in one loopor in a plurality of loops around the receiving device (1). In thiscase, the loops can be fitted in cavities (10) of the receiving device(1), wherein the cavities (10) are formed between a rear part (9) of thereceiving device (1) and a front side of the receiving device (1). Thefront side of the receiving device (1) can be formed in particular by awavy profile (6), which forms preferably a holding device (5) within thereceiving device (1). The holding device (5) can, however, also beformed by a metal or plastics plate configured for example in atwo-dimensional manner. Preferably, the holding device (5) is configuredin a resilient manner, such that it can be bent forward or to the rearin order to increase or reduce the size of the cavity (10) for receivingthe suction hose (2). When the size of the cavity (10) is increased, thesuction hose (2) can be fitted particularly easily in the holding device(5) or the receiving device (1). When the size of the cavity (10) isreduced, the suction hose (2) can be clamped within the holding device(5) or within the receiving device (1) and as a result be fixed withinthe device (1 or 5).

When the holding device (5) is formed by a wavy profile (6) or comprisesa wavy profile (6) it is preferred, in the context of the invention,that the wavy profile (6) has recesses (7) and elevations (8). In thecontext of the invention, it is in particular preferred that the wavyprofile (6) has as many recesses (7) as there are loops of the suctionhose (2) that are intended to be received. If for example two loops ofthe suction hose (2) are intended to be received, it is preferred, inthe context of the invention, that the wavy profile (6) has two recesses(7) for receiving the suction hose (2). The recesses (7) are preferablydesigned to form, together with the rear part (9) of the receivingdevice (1), cavities (10) for receiving the suction hose (2).

FIG. 3 shows a preferred configuration of the vacuuming device (4) withthe receiving device (1). In particular, FIG. 3 schematically shows acentral unit (3) of a vacuuming device (4), wherein a suction hose (2)is fastened to the central unit (3). The vacuuming device (4)illustrated in FIG. 3 can preferably both be carried as a backpackcleaner on a user's back and be used as a floor-based cleaner (4). Inorder to be used as a backpack cleaner, the vacuuming device (4) has acarrying system (11), which is similar to the carrying system of abackpack or of a frame backpack. The receiving device (1) can befastened to the carrying system (11). The exemplary embodiment,illustrated in FIG. 3 , of the receiving device (1) has a metal plate asholding device (5). This metal plate (5) is substantially parallel tothe rear part (9) of the receiving device (1), wherein a distancebetween the metal plate (5) and rear part (9) can be increased orreduced by bending the preferably resilient metal plate (5) forward ortoward the rear. The suction hose (2) can be fitted in the resultantcavity (10). In the exemplary embodiment, illustrated in FIG. 3 , of theinvention, three loops of the suction hose (2) have been fitted in thereceiving device (1). In this state, the suction hose (2) is locatedsubstantially fully in the receiving device (1) and the vacuuming device(4) can be transported particularly easily as a whole, including thesuction hose (2).

LIST OF REFERENCE SIGNS

-   -   1 Receiving device    -   2 Suction hose    -   3 Central unit    -   4 Vacuuming device    -   5 Holding device    -   6 Wavy profile    -   7 Recesses    -   8 Elevations    -   9 Rear part    -   10 Cavities    -   11 Carrying system    -   12 Nozzle

What is claimed is: 1-9. (canceled)
 10. A device for receiving a suctionhose connecting a nozzle of a vacuuming device to a central unit of thevacuuming device, the device comprising: at least one holding devicefastenable to the central unit of the vacuuming device, the suction hosebeing fittable in the at least one holding device.
 11. The device asrecited in claim 10 wherein the device does not comprise any movingparts.
 12. The device as recited in claim 10 wherein the at least oneholding device has a wavy profile.
 13. The device as recited in claim 12wherein the wavy profile has recesses and elevations, wherein therecesses of the wavy profile form, with a rear part of the device,cavities for receiving the suction hose.
 14. The device as recited inclaim 10 wherein the device is integratable into a carrying system ofthe vacuuming device.
 15. The device as recited in claim 10 wherein theat least one holding device numbers one to five holding devices.
 16. Thedevice as recited in claim 10 wherein the at least one holding devicenumbers one to three holding devices.
 17. The device as recited in claim10 wherein the at least one holding device numbers two holding devices.18. The device as recited in claim 10 the at least one holding device(5) comprises metal and/or plastic.
 19. A vacuuming device comprising: acentral unit connected to a suction hose having a nozzle; and at leastone holding device fastenable to the central unit, the suction hosebeing fittable in the at least one holding device.
 20. The vacuumingdevice as recited in claim 19 wherein the suction hose is configured ina pressure-stable manner.